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Finding the Fourth Proportional to 18,754.12, 28,137.12 and 11,738.62

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Solution

The fourth proportional to 18,754.12, 28,137.12 and 11,738.62 is: 17,611.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.12 : 28,137.12 = 11,738.62 : x
  2. Step 2: Convert to fraction form
    18,754.12/28,137.12 = 11,738.62/x
  3. Step 3: Cross multiply
    18,754.12x = 28,137.12 × 11,738.62
  4. Step 4: Simplify right side
    18,754.12x = 330,290,959.57
  5. Step 5: Solve for x
    x = 330,290,959.57/18,754.12
  6. Step 6: Final answer
    x = 17,611.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.